尖镰孢菌非致病菌株对南方根结线虫数量的控制

温室盆钵实验证实尖镰孢菌（Fusarium oxysporum)非致病菌株（S162）可有效控制南方根结线虫（Meloidogyme incognita)的群体数量，在F.oxysporum M,incognita和Bacillus cereus(蜡状芽孢杆菌）＋F oxysporum M.incognita处理中，每克根卵囊仅为对照K－M（接种M.incognita) 的1／3和1／5。该菌株处理的番茄幼苗的地上鲜重，根重和根长均高于对照，且处理5周后在番茄根上没有分离到该菌，盆钵实验中，F.oxysporum菌液对根结线虫和大豆胞囊线虫的侵染抑制率分别为46．4％和53．6％，该菌株的培养滤液能抑制根结线虫和大豆胞囊线虫卵的孵化，经琼脂平行测定，其抑制率分别为18．4％和14．2％，

The effect of the non-pathogenic Fusarium oxysporum strain on Meloidogyne incognita

The objectives of the paper were to explore the effect of non-pathogenic Fusarium oxysporum strain on Meloidogyne incognita and physiological activities of metabolic product of n on-pathogenic Fusarium oxysporum.The egg sacper gram of root in treatments with F.oxysporum＋M.incognita and Bacillus cereus＋F.oxysporum＋M.incogni ta was only one-third and one-fifth as many as the control.In pot experiment,the fresh shoot weight,the fresh root weight and root length of the treated tomato were all better than that of the control.The fungus could not be reisolated from the treated tomato in 5 weeks.The spores,and metabolic activities of F.ox ysporium could control juveniles infection of M.incognita and Heterodera glycines and the controlling rate were 46.4% and 53.6% in pot test,respecti vely.The metabolic activities produced by F.oxysporum could affect eggs hatch of M.incognita and H.glycines in agar plate,the controlling rate we re 18.4% and 14.2%,respectively.